35×(4×2)×25
=35x2x4x25
=70x100
=7000
990÷【2×(17+28)】
=990÷(2x45)
=990÷90
=11
18×137-18×37
=18x(137-37)=
18x100
=1800
75×12+280÷35
=75x4x3+280÷7÷5
=300x3+40÷5
=908
52×99+52
=52+(99+1)
=152
35×(4×2)×25
=35x2x4x25
=70x100
=7000
990÷【2×(17+28)】
=990÷(2x45)
=990÷90
=11
18×137-18×37
=18x(137-37)=
18x100
=1800
75×12+280÷35
=75x4x3+280÷7÷5
=300x3+40÷5
=908
52×99+52
=52+(99+1)
=152